Accumulated Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax	$ 0	$ 1	$ 23
Accumulated comprehensive loss, net of tax, beginning of period	(122)	(89)	(99)	$ (174)
Amortization of amounts included in net periodic benefit cost	0	0	1
Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease)	33	(6)	(2)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	4	71
Accumulated comprehensive loss, net of tax, end of period	(122)	(89)	(99)	(174)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated comprehensive loss, net of tax, beginning of period	0	0	(5)	(76)
Amortization of amounts included in net periodic benefit cost	0	0	0
Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease)	0	0	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	4	71
Accumulated comprehensive loss, net of tax, end of period	0	0	(5)	(76)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated comprehensive loss, net of tax, beginning of period	(122)	(89)	(94)	(96)
Amortization of amounts included in net periodic benefit cost	0	0	0
Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease)	33	(6)	(2)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0
Accumulated comprehensive loss, net of tax, end of period	(122)	(89)	(94)	(96)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated comprehensive loss, net of tax, beginning of period	0	0	0	(1)
Amortization of amounts included in net periodic benefit cost	0	0	1
Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease)	0	0	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0
Accumulated comprehensive loss, net of tax, end of period	$ 0	$ 0	$ 0	$ (1)